Synthesis of low-dimensional metal halide CsAgCl2 for X-ray scintillation applications

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2024-09-30 DOI:10.1016/j.jlumin.2024.120924

Heng Guo

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引用次数: 0

Abstract

Low-dimensional metal halides, which possess efficient luminescent properties, have garnered significant interest in the fields of optoelectronics and radiation detection. This study introduces novel lead-free silver-based metal halide material, CsAgCl₂ microcrystals (MCs). These MCs have a one-dimensional atomic chain structure and a unique [AgCl₅]^4- tetragonal shared triangular configuration. CsAgCl₂ MCs exhibit excellent performance as X-ray scintillators due to their bright broadband yellow emission and fast decay time in the microsecond range. The large Stokes shift of 350 nm is produced by self-trapped exciton emission. In X-ray scintillation applications, CsAgCl₂ MCs demonstrate a high light yield of 13280 photons/MeV and a wide range of linear scintillation response. It is noteworthy that the CsAgCl₂ MCs maintain good stability under both atmospheric conditions and continuous X-ray irradiation. The sample was used in an X-ray imaging screen, which clearly presented the X-ray projection image of a wooden stick. As a result, this research not only contributes to the collection of lead-free metal halide scintillators but also indicates that CsAgCl₂ MCs have a wide range of future applications and potential in areas such as medical imaging, scientific research, and diagnostic and detection technologies.

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合成用于 X 射线闪烁应用的低维金属卤化物 CsAgCl2

低维金属卤化物具有高效发光特性，在光电子学和辐射探测领域备受关注。本研究介绍了新型无铅银基金属卤化物材料 CsAgCl2 微晶（MCs）。这些微晶具有一维原子链结构和独特的[AgCl5]4- 四方共三角形构型。CsAgCl2 MCs 具有明亮的宽带黄色发射和微秒级的快速衰减时间，因此作为 X 射线闪烁体表现出卓越的性能。350 纳米的大斯托克斯偏移是由自俘获激子发射产生的。在 X 射线闪烁应用中，CsAgCl2 MCs 表现出 13280 光子/兆电子伏的高光产率和宽范围的线性闪烁响应。值得注意的是，CsAgCl2 MCs 在大气条件和连续 X 射线辐照下都能保持良好的稳定性。该样品被用于 X 射线成像屏幕，能清晰地呈现木棒的 X 射线投影图像。因此，这项研究不仅有助于收集无铅金属卤化物闪烁体，还表明 CsAgCl2 MCs 未来在医学成像、科学研究、诊断和检测技术等领域具有广泛的应用前景和潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.